Question 13 Marks

Take three non-collinear points A, B and C on a page of your notebook. Join AB, BC and CA. What figure do you get? Name the triangle. Also, name:

1. The side opposite to $\angle\text{B.}$
2. The angle opposite to side AB.
3. The vertex opposite to site BC.
4. The side opposite to vertex B.

Answer

Let us consider three non-collinear points A, B and C join them.
After joining these points, we get a ‘Triangle’, as it consists of three sides. The name of the triangle we get is $\triangle\text{ABC}.$

1. The side opposite $\angle\text{B}$ is AC.
2. The angle opposite side AB is $\angle\text{C}.$
3. The vertex opposite side BC is A.
4. The side opposite vertex B is AC.

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